CN113917534A - Longitudinal and transverse wave matching method and device for geophysical exploration - Google Patents
Longitudinal and transverse wave matching method and device for geophysical exploration Download PDFInfo
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- G01—MEASURING; TESTING
- G01V—GEOPHYSICS; GRAVITATIONAL MEASUREMENTS; DETECTING MASSES OR OBJECTS; TAGS
- G01V1/00—Seismology; Seismic or acoustic prospecting or detecting
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Abstract
The invention discloses a longitudinal and transverse wave matching method for geophysical exploration, which belongs to the technical field of geophysical exploration and comprises the following steps: the first step is as follows: according to the logging information and the well drilling information of the research area, the phase and wave group characteristics of the longitudinal waves and the converted transverse waves of the main interface are determined, and synthetic record calibration is carried out; the method has the advantages that the seismic horizon interpretation processing is carried out on the longitudinal waves and the pure transverse waves after the synthetic record calibration, the interpretation horizon data of the longitudinal waves and the pure transverse waves are obtained, the problems that the positions of the cloud area in the prior art can generate distortion of pulling down the same phase axis and lose original data information can be solved, and the matching effect of the longitudinal waves and the transverse waves in the seismic data is improved.
Description
Technical Field
The invention relates to the technical field of geophysical exploration, in particular to a method and a device for matching longitudinal waves and transverse waves for geophysical exploration.
Background
With the gradual deepening of oil exploration, the requirements on seismic exploration technology are higher and higher, and the exploration is switched from the original simple structure exploration to the lithological exploration and from the lithological prediction to the fluid prediction. The multi-wave seismic technology has obvious advantages in lithology and fluid prediction compared with the traditional longitudinal wave technology. Meanwhile, with the development of software and hardware technologies in recent years, the application of multiple waves is gradually increased.
Because the propagation modes and paths of the longitudinal waves and the converted transverse waves are different, the longitudinal waves are downlink longitudinal wave uplink longitudinal waves, the converted transverse waves are downlink longitudinal wave uplink transverse waves, meanwhile, the reflection points of the longitudinal waves are different from the conversion points of the converted transverse waves, and simultaneously, because the influence degrees of the longitudinal waves and the transverse waves subjected to earth filtering in the retransmission process are different, the longitudinal waves and the transverse waves have larger differences in amplitude, phase and travel time. The multi-wave technology needs to jointly apply longitudinal waves and converted transverse waves, so the quality of matching of the longitudinal waves and the transverse waves directly influences the application of the multi-wave technology, and therefore, a longitudinal wave and transverse wave matching method and device for geophysical exploration are provided.
Disclosure of Invention
The invention aims to provide a longitudinal and transverse wave matching method for geophysical exploration, which comprises the following steps:
the first step is as follows: according to the logging information and the well drilling information of the research area, determining the phase and wave group characteristics of longitudinal waves and converted transverse waves of a main interface, and performing synthetic record calibration;
the second step is that: performing seismic horizon interpretation processing on the longitudinal waves and the pure transverse waves after the synthetic record calibration to obtain interpretation horizon data of the longitudinal waves and the pure transverse waves, performing well control processing on the longitudinal waves and the converted transverse waves respectively, keeping the correctness of the relative amplitudes and phases of the longitudinal waves and the converted transverse waves, comparing the polarities of the longitudinal waves and the converted transverse waves, performing phase correction, and adjusting the polarities of the longitudinal waves and the converted transverse waves of the same interface to be consistent;
the third step: according to the explained horizon data of longitudinal waves and pure transverse waves and the pre-calculated velocity ratio of longitudinal waves to transverse waves of a target layer at a well point position, performing related spectrum analysis on a seismic channel matched with the converted wave initial time and a longitudinal wave seismic channel, picking up the disturbance amount of the velocity ratio, and correcting the initial velocity ratio of the analysis channel by using the disturbance amount to obtain the velocity ratio of the longitudinal waves to the transverse waves based on horizon explanation and fine disturbance;
the fourth step: acquiring a data body comprising a longitudinal wave velocity ratio according to pre-stack data of a longitudinal wave, converting the converted transverse wave from the time domain of the converted transverse wave to the time domain of the longitudinal wave by using the data body comprising the longitudinal wave velocity ratio, picking up an identification layer which can stably track in the whole research area, performing horizon fine correction on the converted time domain of the converted transverse wave by using the identification layer to obtain a three-dimensional longitudinal wave velocity ratio data body based on horizon interpretation and fine disturbance, and converting the time of a converted wave section to the double-pass time of the longitudinal wave by using the velocity ratio body, namely completing the longitudinal wave and converted wave time matching of the method.
Preferably, the longitudinal and transverse wave matching device for geophysical exploration comprises the following components: the device comprises a synthetic record calibration component, a well control processing component, a phase correction component, a space longitudinal and transverse wave velocity ratio prediction module component, a matching component and a fine correction component.
Compared with the prior art, the invention has the beneficial effects that: according to the embodiment of the invention, the synthetic record calibration is carried out on the longitudinal wave and the pure transverse wave in the seismic data of the research area according to the logging data and the well drilling data of the research area; the method has the advantages that the seismic horizon interpretation processing is carried out on the longitudinal waves and the pure transverse waves after the synthetic record calibration, the interpretation horizon data of the longitudinal waves and the pure transverse waves are obtained, the problems that the positions of the cloud area in the prior art can generate distortion of pulling down the same phase axis and lose original data information can be solved, and the matching effect of the longitudinal waves and the transverse waves in the seismic data is improved.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The invention provides a technical scheme that: a longitudinal and transverse wave matching method for geophysical exploration comprises the following steps:
the first step is as follows: according to the logging information and the well drilling information of the research area, determining the phase and wave group characteristics of longitudinal waves and converted transverse waves of a main interface, and performing synthetic record calibration;
the second step is that: performing seismic horizon interpretation processing on the longitudinal waves and the pure transverse waves subjected to synthetic record calibration to obtain interpretation horizon data of the longitudinal waves and the pure transverse waves, performing well control processing on the longitudinal waves and the converted transverse waves respectively, keeping the correctness of the relative amplitudes and phases of the longitudinal waves and the converted transverse waves, comparing the polarities of the longitudinal waves and the converted transverse waves, performing phase correction, and adjusting the polarities of the longitudinal waves and the converted transverse waves of the same interface to be consistent;
the third step: according to the explained horizon data of longitudinal waves and pure transverse waves and the pre-calculated velocity ratio of longitudinal waves to transverse waves of a target layer at a well point position, performing related spectrum analysis on a seismic channel matched with the converted wave initial time and a longitudinal wave seismic channel, picking up the disturbance amount of the velocity ratio, and correcting the initial velocity ratio of the analysis channel by using the disturbance amount to obtain the velocity ratio of the longitudinal waves to the transverse waves based on horizon explanation and fine disturbance;
the fourth step: the method comprises the steps of obtaining a data body comprising a longitudinal wave velocity ratio according to pre-stack data of a longitudinal wave, utilizing the data body comprising the longitudinal wave velocity ratio to convert a converted transverse wave from a time domain of the converted transverse wave to a time domain of the longitudinal wave, picking up an identification layer which can be stably tracked in the whole research area, utilizing the identification layer to conduct horizon fine correction on the time domain of the converted transverse wave to obtain a three-dimensional longitudinal wave velocity ratio data body based on horizon interpretation and fine disturbance, and utilizing the velocity ratio body to convert the time of a converted wave section to the double-pass time of the longitudinal wave, namely completing the longitudinal wave and converted wave time matching of the method.
A longitudinal and transverse wave matching device for geophysical exploration comprises the following components: a synthetic record calibration component (used for performing synthetic record calibration on longitudinal waves and pure transverse waves in seismic data of a research area according to logging data and well drilling data of the research area), a well control processing component (used for performing well control processing on the longitudinal waves and converted transverse waves respectively and keeping the correctness of the relative amplitudes and phases of the longitudinal waves and the converted transverse waves), a phase correction component (used for comparing the polarities of the longitudinal waves and the converted transverse waves and adjusting the polarities of the longitudinal waves and the converted transverse waves of the same interface to be consistent), a space longitudinal and transverse wave velocity ratio prediction module component (used for predicting the space longitudinal and transverse wave velocity ratio of the research area according to the explanation layer data of the longitudinal waves and the pure transverse waves and the pre-calculated target layer longitudinal and transverse wave velocity ratio of well point positions) and a matching component and a fine correction component (used for predicting the space longitudinal and transverse wave velocity ratio of the research area according to the space longitudinal and transverse wave velocity ratio of the research area, and matching the longitudinal wave in the seismic data to the time domain of the pure transverse wave to obtain the transverse wave time domain longitudinal wave matched with the transverse wave).
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (2)
1. A longitudinal and transverse wave matching method for geophysical exploration is characterized by comprising the following steps: the method comprises the following steps:
the first step is as follows: according to the logging information and the well drilling information of the research area, determining the phase and wave group characteristics of longitudinal waves and converted transverse waves of a main interface, and performing synthetic record calibration;
the second step is that: performing seismic horizon interpretation processing on the longitudinal waves and the pure transverse waves after the synthetic record calibration to obtain interpretation horizon data of the longitudinal waves and the pure transverse waves, performing well control processing on the longitudinal waves and the converted transverse waves respectively, keeping the correctness of the relative amplitudes and phases of the longitudinal waves and the converted transverse waves, comparing the polarities of the longitudinal waves and the converted transverse waves, performing phase correction, and adjusting the polarities of the longitudinal waves and the converted transverse waves of the same interface to be consistent;
the third step: according to the explained horizon data of longitudinal waves and pure transverse waves and the pre-calculated velocity ratio of longitudinal waves to transverse waves of a target layer at a well point position, performing related spectrum analysis on a seismic channel matched with the converted wave initial time and a longitudinal wave seismic channel, picking up the disturbance amount of the velocity ratio, and correcting the initial velocity ratio of the analysis channel by using the disturbance amount to obtain the velocity ratio of the longitudinal waves to the transverse waves based on horizon explanation and fine disturbance;
the fourth step: acquiring a data body comprising a longitudinal wave velocity ratio according to pre-stack data of a longitudinal wave, converting the converted transverse wave from the time domain of the converted transverse wave to the time domain of the longitudinal wave by using the data body comprising the longitudinal wave velocity ratio, picking up an identification layer which can stably track in the whole research area, performing horizon fine correction on the converted time domain of the converted transverse wave by using the identification layer to obtain a three-dimensional longitudinal wave velocity ratio data body based on horizon interpretation and fine disturbance, and converting the time of a converted wave section to the double-pass time of the longitudinal wave by using the velocity ratio body, namely completing the longitudinal wave and converted wave time matching of the method.
2. The device for matching longitudinal waves and transverse waves for geophysical exploration according to the claim, characterized in that: comprises the following components: the device comprises a synthetic record calibration component, a well control processing component, a phase correction component, a space longitudinal and transverse wave velocity ratio prediction module component, a matching component and a fine correction component.
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4604734A (en) * | 1980-12-29 | 1986-08-05 | Mobil Oil Corporation | Seismic exploration in areas where p waves are converted to s waves |
| CN1888933A (en) * | 2005-06-28 | 2007-01-03 | 中国石油集团东方地球物理勘探有限责任公司 | Transversal wave or conversion transversal wave exploration near-earth surface structure survey method |
| CN103439739A (en) * | 2013-04-08 | 2013-12-11 | 中国石油集团东方地球物理勘探有限责任公司 | Method for matching longitudinal waves with transverse waves for geophysical exploration |
| CN104570079A (en) * | 2013-10-29 | 2015-04-29 | 中国石油化工股份有限公司 | Time matching method of longitudinal wave and converted shear wave seismic data |
| CN112379439A (en) * | 2020-11-02 | 2021-02-19 | 中国石油天然气集团有限公司 | Method and device for matching longitudinal wave and transverse wave in seismic data |
-
2021
- 2021-09-01 CN CN202111021460.9A patent/CN113917534A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4604734A (en) * | 1980-12-29 | 1986-08-05 | Mobil Oil Corporation | Seismic exploration in areas where p waves are converted to s waves |
| CN1888933A (en) * | 2005-06-28 | 2007-01-03 | 中国石油集团东方地球物理勘探有限责任公司 | Transversal wave or conversion transversal wave exploration near-earth surface structure survey method |
| CN103439739A (en) * | 2013-04-08 | 2013-12-11 | 中国石油集团东方地球物理勘探有限责任公司 | Method for matching longitudinal waves with transverse waves for geophysical exploration |
| CN104570079A (en) * | 2013-10-29 | 2015-04-29 | 中国石油化工股份有限公司 | Time matching method of longitudinal wave and converted shear wave seismic data |
| CN112379439A (en) * | 2020-11-02 | 2021-02-19 | 中国石油天然气集团有限公司 | Method and device for matching longitudinal wave and transverse wave in seismic data |
Non-Patent Citations (1)
| Title |
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| 龚雪萍;陈双全;李向阳;: "改进纵波与转换波时间匹配方法研究", 石油地球物理勘探 * |
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